.site-nav {
  background: rgba(17, 24, 39, 0.92);
  color: var(--color-text);
  box-shadow: 0 1px 0 var(--color-border), var(--shadow-md);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.site-nav .container { display: flex; align-items: center; gap: 0; }
.site-nav-links { display: flex; flex-wrap: wrap; flex: 1; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-text);
  font-size: 0.9rem;
}
.nav-toggle:hover { border-color: var(--color-primary); }
.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
}
.nav-toggle-icon { position: relative; }
.nav-toggle-icon::before, .nav-toggle-icon::after { content: ""; position: absolute; left: 0; }
.nav-toggle-icon::before { top: -6px; }
.nav-toggle-icon::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after { top: 0; transform: rotate(-45deg); }

.site-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-3) var(--space-4);
  font-weight: 500;
  font-size: 0.95rem;
  display: inline-block;
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.site-nav a:hover { color: var(--color-text); background: rgba(6, 182, 212, 0.08); }
.site-nav a[aria-current="page"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  background: rgba(6, 182, 212, 0.06);
}

.site-nav .block-nav-list {
  padding: 0;
  background: transparent;
  border: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}
.site-nav .block-nav-list h2, .site-nav .block-nav-list h3 { display: none; }
.site-nav .block-nav-list ul { display: contents; }
.site-nav .block-nav-list ul ul { display: none; }
.site-nav .block-nav-list li { list-style: none; position: relative; }
.site-nav .block-nav-list li.has-children { display: flex; align-items: center; }
.site-nav .block-nav-list li.submenu-open > ul { display: block; }

.site-nav .block-nav-list .submenu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  padding: 0;
  background: transparent;
  border: 0;
  cursor: pointer;
  color: var(--color-text-muted);
}
.site-nav .submenu-caret {
  display: inline-block;
  font-size: 0.7rem;
  line-height: 1;
  transition: transform 0.2s var(--ease);
}
.site-nav .block-nav-list .submenu-toggle[aria-expanded="true"] .submenu-caret { transform: rotate(180deg); }

.site-nav .block-nav-list a, .site-nav .block-nav-list span {
  padding: var(--space-3) var(--space-4);
  background: transparent;
  color: var(--color-text-muted);
  font-weight: 500;
  border-radius: 0;
  font-size: 1rem;
  border-bottom: 2px solid transparent;
}
.site-nav .block-nav-list a:hover { background: rgba(6, 182, 212, 0.08); color: var(--color-text); }
.site-nav .block-nav-list .active > a, .site-nav .block-nav-list .active > span {
  color: var(--color-primary);
  background: rgba(6, 182, 212, 0.06);
  border-bottom: 2px solid var(--color-primary);
  border-radius: 0;
}

@media (min-width: 901px) {
  .site-nav .block-nav-list li.submenu-open > ul {
    position: absolute;
    top: 100%;
    left: 0;
    display: grid;
    gap: var(--space-1);
    min-width: 220px;
    padding: var(--space-2);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    z-index: 10;
  }
  .site-nav .block-nav-list li > ul li { list-style: none; }
  .site-nav .block-nav-list li > ul a, .site-nav .block-nav-list li > ul span {
    padding: var(--space-2) var(--space-3);
    border-bottom: none;
    border-radius: var(--radius-sm);
  }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .site-nav .container { flex-wrap: wrap; padding-block: var(--space-2); justify-content: space-between; }
  .site-nav-links { display: none; flex-direction: column; flex-basis: 100%; }
  .site-nav-links.is-open { display: flex; }
  .site-nav .block-nav-list { flex-direction: column; width: 100%; }
  .site-nav .block-nav-list a, .site-nav .block-nav-list span { padding: var(--space-3); width: 100%; border-bottom: 1px solid var(--color-border); }
  .site-nav .block-nav-list li.has-children { flex-wrap: wrap; }
  .site-nav .block-nav-list li.has-children > a, .site-nav .block-nav-list li.has-children > span { flex: 1; }
  .site-nav .block-nav-list li > ul { flex-basis: 100%; padding-left: var(--space-4); }
}
@media (scripting: none) and (max-width: 900px) {
  .site-nav-links { display: flex; }
  .nav-toggle { display: none; }
}

.block-anchor {
  scroll-margin-top: calc(var(--space-4) + 3.5rem);
}

.layout-main {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  padding-block: var(--space-12);
}
@media (min-width: 900px) {
  .layout-main.has-sidebar {
    grid-template-columns: minmax(0, 1fr) 300px;
  }
  .layout-main.has-sidebar > main { order: 1; }
  .layout-main.has-sidebar > aside { order: 2; }
}
main { min-width: 0; }
aside { min-width: 0; }
aside details {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}
aside details > summary {
  cursor: pointer;
  font-weight: 600;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-elevated);
  color: var(--color-text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
aside details > summary::-webkit-details-marker { display: none; }
aside details > summary::after { content: "+"; font-size: 1.25rem; color: var(--color-primary); }
aside details[open] > summary::after { content: "−"; }
aside details[open] > summary { margin-bottom: 0; }
aside details > div { padding: var(--space-4); }
@media (min-width: 900px) {
  aside details > summary { display: none; }
  aside details[open] > summary { display: none; }
}